:root {
  --bg-app: #0d1117;
  --bg-sidebar: #161b22;
  --bg-chat: #0d1117;
  --bg-card: #21262d;
  --bg-hover: #1c2128;
  --border: #30363d;
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
  --success: #3fb950;
  --warning: #d29922;
  --error: #f85149;
  --me-bg: #1f6feb;
  --peer-bg: #21262d;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; background: var(--bg-app); color: var(--text-main); overflow: hidden; }

.app-layout {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ----------- Left Sidebar ----------- */
.sidebar-left {
  width: 320px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.branding { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.branding-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.branding-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn.danger { color: var(--error); }
.icon-btn.danger:hover { background: rgba(248, 81, 73, 0.12); }
.conv-delete {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.conv-item:hover .conv-delete { opacity: 1; }
.conv-delete:hover { background: rgba(248, 81, 73, 0.12); color: var(--error); }
.conv-unseen {
  min-width: 18px;
  height: 18px;
  padding: 0 6px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
}
.conv-item.active .conv-unseen { background: var(--accent); }
.branding h1 { margin: 0; font-size: 18px; color: var(--accent); }
.version-tag { margin: 4px 0 0; font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

.identity-row {
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.01);
}
.identity-info { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.identity-label { font-size: 10px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.5px; }
.identity-callsign { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.identity-callsign span { font-size: 10px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.5px; }
.identity-callsign input { width: 100%; padding: 6px 10px; font-size: 12px; }

.conv-search { padding: 10px 16px; border-bottom: 1px solid var(--border); }
.conv-search input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-main);
  border-radius: 16px;
  padding: 6px 12px;
  font-size: 12px;
}

.conversation-list { flex: 1; overflow-y: auto; }
.empty-list { padding: 32px 20px; text-align: center; color: var(--text-muted); }
.empty-list p { margin: 0 0 12px; font-size: 13px; }

.conv-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}
.conv-item:hover { background: var(--bg-hover); }
.conv-item.active { background: var(--accent-soft); border-left: 3px solid var(--accent); padding-left: 13px; }
.conv-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.conv-avatar.group { background: linear-gradient(135deg, #1f6feb, #58a6ff); border-color: transparent; }
.conv-body { flex: 1; min-width: 0; }
.conv-name { font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 6px; }
.conv-meta { font-size: 11px; color: var(--text-muted); margin-top: 2px; display: flex; align-items: center; gap: 6px; }
.conv-status { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); flex-shrink: 0; }
.conv-status.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.conv-status.connecting { background: var(--warning); }
.conv-status.error { background: var(--error); }
.conv-preview { font-size: 11px; color: var(--text-muted); margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ----------- Center Chat ----------- */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-chat);
  min-width: 0;
}
.chat-header {
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(22, 27, 34, 0.5);
  backdrop-filter: blur(10px);
}
.header-main { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.header-title-block { display: flex; flex-direction: column; min-width: 0; }
.chat-header h2 { margin: 0; font-size: 16px; }
.chat-subtitle { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.chat-badges { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--border);
  color: var(--text-muted);
}
.badge.mono { font-family: monospace; }
.header-roster { margin-top: 8px; font-size: 12px; color: var(--text-muted); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.welcome-screen { flex: 1; display: flex; align-items: center; justify-content: center; }
.welcome-card { text-align: center; max-width: 380px; padding: 32px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; }
.welcome-card h2 { margin: 0 0 8px; font-size: 18px; }
.welcome-card p { color: var(--text-muted); font-size: 13px; margin: 0 0 18px; }

.chat-msg { max-width: 70%; padding: 10px 14px; border-radius: 12px; font-size: 14px; position: relative; }
.chat-msg.me { align-self: flex-end; background: var(--me-bg); border-bottom-right-radius: 2px; }
.chat-msg.peer { align-self: flex-start; background: var(--peer-bg); border-bottom-left-radius: 2px; border: 1px solid var(--border); }
.chat-msg .sender { font-size: 10px; opacity: 0.7; margin-bottom: 4px; display: block; }

.system-msg { align-self: center; font-size: 12px; color: var(--text-muted); font-style: italic; margin: 8px 0; }

.chat-input-bar {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
}
.chat-input-bar input { flex: 1; border-radius: 20px; padding-left: 16px; }

/* ----------- Buttons / Inputs ----------- */
select, button, input, textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-main);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: inherit;
}
button { cursor: pointer; font-weight: 600; }
button.primary { background: var(--me-bg); border-color: var(--accent); color: #fff; }
button.primary:hover { background: #388bfd; }
button.ghost { background: transparent; }
button.ghost:hover { background: var(--bg-hover); }
button.small { padding: 4px 10px; font-size: 11px; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.icon-btn {
  width: 30px; height: 30px;
  padding: 0;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 18px;
  line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

textarea { resize: vertical; }

/* ----------- Right Sidebar ----------- */
.sidebar-right {
  width: 300px;
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.section-header {
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.section-header h3 { margin: 0; font-size: 13px; color: var(--text-muted); text-transform: uppercase; }
.count-pill { background: var(--border); padding: 2px 8px; border-radius: 10px; font-size: 11px; }

.peers-list-section { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.peer-list { flex: 1; overflow-y: auto; }
.peer-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.peer-item:hover { background: var(--bg-card); }
.peer-item .peer-did { font-size: 12px; font-weight: 600; display: block; margin-bottom: 4px; }
.peer-item .peer-status { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text-muted); }

.status-indicator { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.status-indicator.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-indicator.connecting { background: var(--warning); }
.status-indicator.error { background: var(--error); }

.empty-peers { padding: 40px 20px; text-align: center; color: var(--text-muted); font-size: 13px; }

.logs-section { height: 250px; border-top: 1px solid var(--border); display: flex; flex-direction: column; }
.log-view {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  background: #010409;
  font-family: monospace;
  font-size: 11px;
}
.log-entry { margin-bottom: 4px; border-left: 2px solid transparent; padding-left: 6px; }
.log-entry.info { color: #8b949e; }
.log-entry.warn { color: var(--warning); border-color: var(--warning); }
.log-entry.error { color: var(--error); border-color: var(--error); }
.log-entry .timestamp { color: #484f58; margin-right: 6px; }

/* ----------- Modal ----------- */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal[hidden] { display: none; }
.modal-content {
  background: var(--bg-sidebar);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  width: 420px;
  max-width: 92vw;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-content.wide { width: 520px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-header h3 { margin: 0; font-size: 16px; }

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 14px;
}
.segmented.primary-tabs .seg-btn { font-size: 13px; }
.seg-btn {
  flex: 1;
  background: transparent;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
}
.seg-btn:hover { color: var(--text-main); }
.seg-btn.active { background: var(--accent-soft); color: var(--accent); }

.modal-panel { display: flex; flex-direction: column; gap: 10px; }
.field-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.modal-panel input, .modal-panel textarea { width: 100%; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

.invite-result { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); display: flex; flex-direction: column; gap: 8px; }
.invite-link { color: var(--accent); text-decoration: none; font-size: 12px; word-break: break-all; padding: 8px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; }
.invite-link:hover { text-decoration: underline; }
.hint { font-size: 11px; color: var(--text-muted); margin: 4px 0; }

.mono-text { font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace; font-size: 12px; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.details-list { display: grid; grid-template-columns: 120px 1fr; gap: 8px 16px; margin: 8px 0 0; font-size: 13px; }
.details-list dt { color: var(--text-muted); }
.details-list dd { margin: 0; font-weight: 600; word-break: break-all; }

.qr-body { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 12px 0 4px; }
.qr-canvas { background: #ffffff; padding: 12px; border-radius: 8px; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; }
.qr-canvas svg { display: block; width: 240px; height: 240px; }
.qr-hint { font-size: 12px; color: var(--text-muted); margin: 0; }
.qr-link-row { display: flex; gap: 6px; width: 100%; }
.qr-link-row input { flex: 1; min-width: 0; font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, monospace; font-size: 12px; }
@media (max-width: 1100px) {
  .sidebar-right { display: none; }
}
@media (max-width: 768px) {
  .sidebar-left { width: 100%; position: absolute; z-index: 5; }
}